Power-drill



J. C. H. VAUGHT.

POWER DRILL.

APPLICATION FILED DEC.6,1917.

Patented my 18,1920.

2 SHEETS$HEET I- J. c. H. VAUGHT.

POWER DRILL.

'APPLICATION FILED DEC-6| 1917.

Patented May 18, 1920.. 2 SHEETS-SHEET 2 JAMES C. H. VAUGH'I, 01 NEW YORK, N. Y.

. POWER-DRILL.

Specification of Letters Patent. Y Patented May 18, 1920 Application filed December 6, 1917. Serial No. 205,711.

1 0 all whom it may concern:

Be it known that 1, JAMES C. H. VnUerrr, a citizen of the United States, residing at New York, in the county and State of New .York, .have made a certain new and useful Invention in Power-Drills, of which the following is a specification.

This invention relates to power drills, and particularly to the class which uses a shell or support and a feed screw with which the machine is fed forward to its work during the drilling operation.

The object of the invention is to provide a power drill which is simple in construction and eflicient in operation.

.1 further object of the invention is to provide a feed attachment which may. be applied to standard types of power drills.

A further object of the invention is to provide a feed apparatus for a drill of the class described whereby a machine may be fed forward by means of the usual feed screw, and in addition thereto to provide a means to render the feed-screw inoperative when it is necessary to return the machine to is rearward or retracted position. The object of rendering the usual feed screw inoperative when it becomes necessary to return the same to its retracted position is to save time which with the present type of power drills is now lost in forcing the machine rearwardly.

Further objects of the invention will appear more fully hereinafter.

The invention consists substantially in the construction, combination, location, and relative arrangement of parts, all as will be more fully hereinafter set forth as shown in the accompanying drawing, and finally pointed out in the appended claims.

Referring to the drawings Figure 1 is a view in side elevation. partly in section, of a drill. embodying my invention.

Fig. 2 is a longitudinal sectional view of Fig. 5 is a top plan view of the inclined plane member indicated by reference numeral 4,.F1g. 1.

Fig. 6 is a top plan view of a handle used on the inclined plane member.

Fig. 7 is a cross section of the same taken on the line 7-7, Fig. 2, and looking 1n the direction of the arrows. Fig. 8 1s a side elevation of the same.

Fig. 9 is a side elevation of the inclined plane member 17 Fig. 10 is a top plan view of a portion of the shell or support, shell rods, feed the machine proper. 1

Fig.11 is an end view of the yoke shown at numeral 8, Fig. 10.

' Fig. 12 is a bottom View of the gib which meshes with the feed screw.

Fig. 13 is a top plan view of the gib.

Fig. 14 is a sectional view taken on the line 9, 9, Fig. 17, and looking in the direction of the arrows.

Fig. 15 is a rear view of the gib.

Fig. 16 is a view in section showing a slightly modified form of construction embodying my invention.

F ig-. 17 is a top plan view of the housing.

Fig. 18 is a side elevation of the gib.

Fig. 19 is a top view of a tube and jam nut which is rigidly secured to the cylinder of the machine.

The same part is designated by the same reference numeral wvherever it occurs throughout the several views.

In the construction of mounted power drills using a shell or support it is the usual custom to supply such machines with a feed screw to feed the machine forward during the drilling operation, and by the use of the same feed screw it is the practice to return the same to its initial position. The forward and rearward movement of the machine is made possible in machines now in common use by providing the cylinder of the machine with an eye on the under side of the machine and at the rear end of the cylinder. Into this eye is placed what is commonly called a feed nut which projects beyond the eye of the cylinder, and on the projecting portion of the feed nut it is the practice to provide a jam nut, the purpose of the jam nut being to hold the cylinder and the feed nut in rigid unison. It is obvious that the feed nut must be provided with a threaded screw within its interior in which the usual feed. screw moves when the machine is being fed forward as well as screw, yoke, and crank, disassembled from when it is being returned or retractedto'its not be speeded beyond the cutting capacity of the drill bit. It is likewise apparent that in returning the machine to its initial or rearwardposition the operation is as slow as the maximum speed that; can be attained in advancing the machine, and consequently the lossof much time is the inevitable result. In power drilling: work where efficiency is to be maintained anytime wasted such as is required to return the machine to its re tracted position is objectionable. -Vith a view of overcomingparticularly this objection it is the purpose-of-my present inven tion to design and devise a means to feed a machine forward and to allow the machine to be retracted quickly; Another advantage ofmy invention is that the control of the feed apparatus renders it possible' to ad Vance the ma hine forward-lyas far as 'desired without necessitating the use :of said .screwn' The advantageof'tlns is that'when forward until the drill bit' is in contact with 5 the rock causes an additionalloss' of'time.

While' I have shown and-will now describe my invention {is-forming a 'partof a complete machlne l wish it to -be "understood that the same-may -form an attachment which may be readily applied-toall chines now in use; In accordance with my invention 1 provide a hollow tube 11 like that shown in Fig. :19, the same having a smoothinner surface. Thistube F insert in theeye of the machine On the exterior of the tube I providea thread to receive the jamnut On theouter end of the tube I secure" a housing -13 shown- '=in "Fig. 1T1 In said -housingwl provide an oblong slet le which communicateswith the oblong slot in the tube'15. vi ithinsuchrslot-is inserted a gib like that-shown in Figs; l2, l3, 15,'and' 18, and-"designated byi'eference numeral 16.- To this gib I apply an inclin'edplan'emem her i ,on the outer end of which is secured i the han-dle 5. ll ith'inthe top of the gib'is plZlCQCl a splral spning "18 to excite pressure betweenthe gib and-thesurrounding band to force the gib in engagementwith the feed screw.- Surroundmgtheihousingr is a band :19, the purpose of which is to hold the several partsinnnison will lee-readily understood. -IILF1'5Z. 10 I show an embodiment of a part of the shell or support 20-, the shell rods being indicated at 21, the feed "screw at 22, the cranlr at'QZ-B, and the-yoke atQ JC.

The cylinder and machine proper are assembled with the several parts composing Fig. 10 as is clearly shown in Fig. 1. Fig. ll shows a yoke 8 which is secured to the rear e d of the shell rods and in which the plane m mber 17 when the same is pulled backward into the position shown in full lines Fig. 2. In practice when it becomes necessary to force the machine to its rear wai position the operator forces theinclined plane member 1? to its fartherinost rearward position as shown in Fig; 1 thereby lifting the gib out of engagement with thofeedis mew. When it is desired to feed the machineforwardly and slowly during the drilling operation th operator forces the inclined plahemember 1'7 to its fa rther most forward position as shown in dotted lines 25, Fig. 2, thus allowing the gib to engage with tho feed screw, whereby upon rotation of the feed screw the mac iine is fed forwardly. Within the housing, and preferably atone corner thereof, 1 provide a hole to receive the spiral spring on top of which is placed a metal. ball 27, the ball and spring being imprisoned by slightly battering the orifice of the hole to retain the same therein and at the same time to all w the ball to yieldingly protrude slightly beyond the top so we of the housin against the action of tl spi ng. When the inclined piane is forced to its rearward position the ball will rest'in a ducks nest form d on the under side of the inclined plane 28 which will act as a locking medium to hold the inclined member 17 in position. and therefore keep the threaded .gib out of mesh with the feed screw when it is necessary to force the ma chine (prickly to its rearward position 01 to allow the machine to be forced quickly forwarnly to operative position. i In Fig. 16

' I show a slightly modified forinof constructio1r= whereininstead "of rompletely surrounding the housing and gib with a band I provide a U-shaped clevis which partly surroundsthehousingas well as the several other parts, and-which are-all held inimis-rm by means of a transverse pin 30.

From the foregoing it will be apparent that l have prm'ided a. rock drilling machine attachment which all-(Yves the machine to be fed forward in the usual manner of slot. feed and at the same time to render the feed screw inoperative to allowa quick retraction ofthe ;.achine or a quick forwardfeed-of the machine to its operative position, and v wherein the operation is performed-by hand in a smallfractionnof the time nowrequired for similar purposes by the usualfee'd screw method which is the universal type of power.

modifications and variations in details will readily occur to those skilled in the art without departing from the spirit and scope of my invention as defined in the claims, and I therefore desire that the foregoing specific structures be interpreted in an illustrative sense rather than in a limiting sense.

Having now set forth the objects and nature of my invention, and having shown and described in detail structures embodying the principles thereof, what 1 claim as new and useful and of my own invention, and desire .to secure by Letters Patent, is '1. In a rock drilling machine of the mounted type, an eye or opening in the rear end of the cylinder of the machine, a tube located in said eye and having a smooth inner surface and a threaded outer surface, means for holding the tube and cylinder in rigid unison, a feed screw located in said 7 tube, a housing located on said tube and rovided with a slot a '1b located in SELlCl' slot, a band surrounding the housing and gib to hold the same in unison, and means to raise and lower the gib.

2. In a rock drilling machine of the mounted type, an eye or opening in the rear end of the cylinder of the machine, a tube located insaid eye and having a smooth in nor surface and a threaded outer surface,

means for holding the tube and cylinder in rigid unison, a feed screw located in said tube, a housing located on said tube and provided with a slot, a gib located in said slot; at band surrounding the housing and gib to hold the same in unison, means to raise and lower the gib, and means to lock the gib in its raised position.

3. In a rock drilling machine,a shell or support, said machine being carried by said support, and having an eye in its rear end,-

a tube passing through said eye and having a smooth inner surface and threaded outer surface, means for holding the tube and cylinder in rigid unison, a housing carried by said tube, a slot in said housing and tube,

a gib located therein, an inclined plane member engaging said gib to raise and lower the same, and a band surrminding said housing, gib, and inclined plane member to hold the parts in unison.

4. In a rock drilling machine of the mounted type, an eye or opening in the rear end of the cylinder of the machine, a tube located in said eye and having a smooth innor surface and a threaded outer surface. means to hold the tube and cylinder in rigid unison, a feed screw located in said tube, a housing carried by said tube, a slot located in said housing and tube, a threaded gib located in said slot, a band surrounding the housing and gib, a spring located between the band and gib and normally tending to force the gib to mesh with the feed screw while the machine is being fed forward dur ing the drilling operation thereof,and means to raise the gib out of meshing engagement with the feed screw.

5'. In a rock drilling machine of the mounted type, an eye or opening in therear end of the cylinder of the machine, a tube located in said eye and having a smooth inner surface and a threaded outer surface, means to hold the tube and cylinder in rigid unison, a feed screw located in said. tube, a housing carried by said tube, a slot located in said housing and tube, a threaded gib located in said slot, a band surrounding the housing and gib, a spring located between the band and the gib and normally tending to force the gib to mesh with the feed screw while the machine is being fed forward during the drilling operation thereof, means to raise the gib out of meshing engagement with the feed screw,-and means for locking said gib in its raised position.

6. In a rock drilling machine of the mounted type, a tube secured to the rear end of the cylinder of said machine, said tube having a smooth inner surface, a feed screw a gib located in said slot, said gib being provided with threads to mesh with said feed screw, means normally tending to forcethe gibto engage with said feed screw, and means to disengage the gib from said feed.

screw.

' 7 In a rock drilling machine of the mounted type, a tube secured to the rear end of the cylinder of said machine, said tube having a smooth inner surface, a feed screw located within said tube, a housing carried bysaid tube, a slot in said housing and tube. a gib located in said slot, said gib being provided with threads to mesh with said feed screw, means normally tending to force the gib to engage with said feed screw,'means to disengage the gib from said feed screw, and means for locking said gib in its disengaged relation relative to. said feed screw.

8. In a rock drilling machine of the mounted. type, a cylinder, a tube secured to said cylinder, a feed screw carried by said tube, a housing secured to said tube, a gib located in said housing, said gib provided with means to engage said feed screw to travel along same in one direction or the other when said feed screw is rotated, and means for disengaging said gib from said feed screw.

9. In a rock drilling machine of the mounted type, a cylinder, a tube secured to said cylinder, a feed screw carried by said tube, a housing secured to said tube, a

gib located in said housing, said gib pro vided wlth means to engage said feed screw to travel along same in one direction or-the v moving: sa1d lnchned'plane member;

other when said feed screw is rotated, means for disengaging said gib from said feed screw, and means for locking said gib in its disengaged relation relative to said feed screw.

10. In a rock drilling machine of the mounted type, a cylinder, a tube secured to said cylinder, a feed screw carried by said tube, a housing secured to said tube, a slot located in said housing and tube,=a gib located in said slot, said gib being concaved on its lower face and provided with threads adapted to mesh with said feed screw, and means for forcing said gib out of engagement with the feed screw.

11. In a rock drilling machine of the mounted type, a cylinder, a tube secured to said cylinder, a feed screw carried by said tube, a housing secured to said tube, a slot located in said housing and tubeya gib lo- *ated 111 said slot, said gib being concaved on its lower face and provided'with threads adapted to mesh with said feed screw, means for forcing said gibout of engagement wlth the feed screw, and means for locking said gib out of engagement with said feed screw.

12. In a rock drilling machine of the mounted type, cylinder, a tube secured to said cylinder, a feed screw carriedby' said tube, a housing secured to said tube, a gib located in said housing, said gib being con-- caved on its lower face and-said face being provided with threads adapted to mesh wlth' said feed screw,and means for disengaging said gib from said feed screw.

13. In a rock drilling machine of the mounted type, cylinder, a tube secured to said cylinder, a feed screw carried by said tube, a housing secured to said tube,'a gib located in said housing, sald'glb being concaved on its lower face andsaidface being provided with threads adapted to mesh with said feed screw, means for disengaging said gib from said feed screw, and

means for locking said gib in its disengaged position.

1%. The combination with a rock drilling machine having an eye or opening in the rear end of thecylinder thereof, of a tube located in said. eye, said tube having a smooth inner surface and a threaded outer surface, meansfor holding the tube and cylinder in rigid unison, a housing on the outer end of said tube, a slot located in saidhousing and tube, a threaded gib carried in said slot, said gib having V-shapedgrooves on each side thereof,a movable into raise andlower said gib andmeans: for

15. The combination with a rock drilling machine having an eye or openinginthe rear end of the cylinder thereof, ofa tube located'in said eye, said tube having a smooth inner surface and a threaded outer surface to receive a 1am nut to hold the tube and'cylinder in rigid unison, a housing on the outer end of said tube, a slot in said housing and tube, a threaded gib in said slot, said gib having V-shaped grooves on each side thereof, a movable inclined plane member working in said grooves to raise and lowe'r said gib, a spring located within the 16. In a rock drilling machine of the mounted type, a tube rigidly secured to the cylinder of said machine, a housing "secured to said tube, a slot located in said housing, a gib carried 1n said slot and provided atits lower end with threads, a feed screw carried in said tube, the threads on said feed screw and gib meshing together while the machine is being fed forward, means for exerting a yieldable tension against the gib to'hold it in mesh with SfllCl screw, a movable inclined plane member working in said housing to' force the gibout of mesh with the feed screw when moved'in its rearward position.

17. In a rock drilling machine of the mounted type, a tube rigidly secured to the cylinder'of said machine, a housing secured to sald tube, a slot located in said houslng',

a gib carried in said slot-and provided at its lower end with threads, a feed-screw carried in said tube, the threads on said feed screw and gib meshing together while the machine is be ing fed forward,1neans for exerting a yieldable tension against the gib to hold it in mesh with said screw, a movable inclined plane member working in said housing-to force the gib-out of mesh with thefeedscrew when moved in its rearward position, and means for locking the inclined plane member in its rearward position.

In testimony whereof I have hereunto set my-7hand on this 3rd day of December, A. D. 191 JAMES C. H. VAUGHT. 

